Study of self-diffusion in dense hydrogen gas by quasielastic incoherent neutron scattering
- 1 November 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 16 (5), 2112-2119
- https://doi.org/10.1103/physreva.16.2112
Abstract
Incoherent quasielastic scattering of neutrons from hydrogen gas has been measured at room temperature and 78°K in a range of pressures from 100 to 2000 atm. We present in some detail the data-reduction procedure which allows us to extract the van Hove self-correction function . We then extract the linewidth of the self-correlation function by assuming a Lorentzian line shape. By extrapolating to the small- limit, we obtain the macroscopic self-diffusion coefficient as a function of density and temperature. We compare the results with the hard-sphere Enskog theory and conclude that there is considerable enhancement over the Enskog values at higher densities.
Keywords
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